imx6q 3.19 kernel lockup on insert usb media
Joshua Clayton
stillcompiling at gmail.com
Thu May 28 14:32:26 PDT 2015
Running a yocto rootfs, which automounts usb storage.
After inserting a usb stick, I got this oops, followed immediately by a hard
lockup of the system.
--
~Joshua Clayton
-------------- next part --------------
[ 45.630521] Unable to handle kernel paging request at virtual address efa4c914
[ 45.637779] pgd = ece9c000
[ 45.640494] [efa4c914] *pgd=00000000
[ 45.644095] Internal error: Oops: 5 [#1] SMP ARM
[ 45.648719] Modules linked in: powerboard(O) evi_fpga_driver(O)
[ 45.654698] CPU: 3 PID: 206 Comm: udevd Tainted: G O 3.19.0uniwest-evi+ #100
[ 45.662793] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 45.669329] task: ece81380 ti: ecc4c000 task.ti: ecc4c000
[ 45.674749] PC is at __rmqueue+0x80/0x3bc
[ 45.678765] LR is at 0x3
[ 45.681307] pc : [<800b5c50>] lr : [<00000003>] psr: 200f0093
[ 45.681307] sp : ecc4dcf8 ip : ecc4dd40 fp : ecc4dd3c
[ 45.692789] r10: 00000000 r9 : efa4c914 r8 : 80a4d540
[ 45.698019] r7 : 00000000 r6 : ef5975f4 r5 : 0000001f r4 : 0000000e
[ 45.704551] r3 : 80a4d67c r2 : 00000034 r1 : 00000000 r0 : 80a4d540
[ 45.711084] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user
[ 45.718311] Control: 10c5387d Table: 7ce9c04a DAC: 00000015
[ 45.724062] Process udevd (pid: 206, stack limit = 0xecc4c238)
[ 45.729900] Stack: (0xecc4dcf8 to 0xecc4e000)
[ 45.734272] dce0: 6ddd3000 00000000
[ 45.742478] dd00: 80a4d5c0 00000000 00000034 80a4d540 80703550 0000000e 0000001f ef5975f4
[ 45.750682] dd20: 00000000 80a4d540 808a9770 00000000 ecc4ddc4 ecc4dd40 800b6484 800b5bdc
[ 45.758886] dd40: 00000141 00041f7b 80a4e204 00000000 00000000 00000000 6ddd3000 809e92fc
[ 45.767089] dd60: ee7bc2fc 00000001 00000100 80a4d5c0 ee7bc308 80a4e20c 000280d0 00000000
[ 45.775294] dd80: ffffffff 00000000 809f0d80 600f0013 00000000 80a4d540 ecc4dec8 000080d0
[ 45.783497] dda0: 00000000 80a4e200 00000141 00000000 00000000 00000000 ecc4de74 ecc4ddc8
[ 45.791700] ddc0: 800b6944 800b5f98 00000000 00000141 80a4d540 00000000 00000000 00000000
[ 45.799905] dde0: 00000000 0000001c ecc4de7c ecc4ddf8 80060748 8005f6dc 80111164 edde0398
[ 45.808108] de00: ecc4dec0 00000000 ecc4de68 ecc4dec0 ffffff9c ece817d0 0000001c 00000000
[ 45.816312] de20: ece817d8 00000010 ece81380 00000000 400f0013 ffffff9c 80a4d540 ecc4de48
[ 45.824516] de40: 8005ff6c 8005fda8 00000000 eb424c38 eb424c38 ffffff9c ecc4dec8 ecc4df5c
[ 45.832719] de60: eb4cca78 00000400 ecc4de84 ecc4de78 800b71f0 800b6854 ecc4de94 ecc4de88
[ 45.840923] de80: 800b7224 800b71e4 ecc4dec4 ecc4de98 80159940 800b7218 80159924 00000400
[ 45.849127] dea0: eb424c38 ffffff9c 7e8c9278 ecc4df5c eb4cca78 00000400 ecc4df44 ecc4dec8
[ 45.857329] dec0: 800fc008 80159930 ecc4df18 edb18000 ecc4df18 7e8c8e78 ecc4df5c eb4cca78
[ 45.865532] dee0: ecc4df14 ecc4def0 80079668 800812a4 553db665 04c4b404 00000000 00000000
[ 45.873736] df00: ee26f0d0 ecc4df18 ecc4df44 ecc4df18 8010c2f8 80079654 553db665 04c4b404
[ 45.881940] df20: 553db665 04c4b404 ffffffea 00004000 ffffff9c 7e8c8e78 ecc4df94 ecc4df48
[ 45.890143] df40: 800f72a8 800fbfdc ecc4df5c 8000f944 ecc4df7c 7e8c9278 8005ff6c 00000000
[ 45.898346] df60: ee26f0d0 eb424c38 7e8c8ec7 7e8c8e78 7e8c9278 7e8c9690 00000055 8000f944
[ 45.906549] df80: ecc4c000 00000000 ecc4dfa4 ecc4df98 800f7318 800f7218 00000000 ecc4dfa8
[ 45.914752] dfa0: 8000f780 800f7300 7e8c8e78 7e8c9278 7e8c8e78 7e8c9278 00000400 7e8c8ec7
[ 45.922956] dfc0: 7e8c8e78 7e8c9278 7e8c9690 00000055 000313dc 00031420 012e31b0 7e8ce230
[ 45.931159] dfe0: 00031208 7e8c8e64 0001d6b4 76e901cc 600f0010 7e8c8e78 dfcfe7f4 fffddbde
[ 45.939349] Backtrace:
[ 45.941860] [<800b5bd0>] (__rmqueue) from [<800b6484>] (get_page_from_freelist+0x4f8/0x6cc)
[ 45.950228] r10:00000000 r9:808a9770 r8:80a4d540 r7:00000000 r6:ef5975f4 r5:0000001f
[ 45.958201] r4:0000000e
[ 45.960793] [<800b5f8c>] (get_page_from_freelist) from [<800b6944>] (__alloc_pages_nodemask+0xfc/0x990)
[ 45.970203] r10:00000000 r9:00000000 r8:00000000 r7:00000141 r6:80a4e200 r5:00000000
[ 45.978171] r4:000080d0
[ 45.980761] [<800b6848>] (__alloc_pages_nodemask) from [<800b71f0>] (__get_free_pages+0x18/0x34)
[ 45.989563] r10:00000400 r9:eb4cca78 r8:ecc4df5c r7:ecc4dec8 r6:ffffff9c r5:eb424c38
[ 45.997532] r4:eb424c38
[ 46.000121] [<800b71d8>] (__get_free_pages) from [<800b7224>] (get_zeroed_page+0x18/0x1c)
[ 46.008337] [<800b720c>] (get_zeroed_page) from [<80159940>] (kernfs_iop_follow_link+0x1c/0x194)
[ 46.017160] [<80159924>] (kernfs_iop_follow_link) from [<800fc008>] (generic_readlink+0x38/0x94)
[ 46.025961] r10:00000400 r9:eb4cca78 r8:ecc4df5c r7:7e8c9278 r6:ffffff9c r5:eb424c38
[ 46.033930] r4:00000400 r3:80159924
[ 46.037582] [<800fbfd0>] (generic_readlink) from [<800f72a8>] (SyS_readlinkat+0x9c/0xe8)
[ 46.045689] r7:7e8c8e78 r6:ffffff9c r5:00004000 r4:ffffffea
[ 46.051471] [<800f720c>] (SyS_readlinkat) from [<800f7318>] (SyS_readlink+0x24/0x28)
[ 46.059230] r10:00000000 r9:ecc4c000 r8:8000f944 r7:00000055 r6:7e8c9690 r5:7e8c9278
[ 46.067197] r4:7e8c8e78
[ 46.069789] [<800f72f4>] (SyS_readlink) from [<8000f780>] (ret_fast_syscall+0x0/0x4c)
[ 46.077647] Code: e2833020 0a00002f e51b2034 e51b0030 (e599c000)
[ 46.083772] ---[ end trace f338577b30f41dca ]---
[ 48.494492] BUG: spinlock lockup suspected on CPU#1, kthreadd/2
[ 48.500466] lock: contig_page_data+0x80/0xd80, .magic: dead4ead, .owner: udevd/206, .owner_cpu: 3
[ 48.509453] CPU: 1 PID: 2 Comm: kthreadd Tainted: G D O 3.19.0uniwest-evi+ #100
[ 48.517649] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 48.524193] Backtrace: [ 48.524453] BUG: spinlock lockup suspected on CPU#2, evi_ctrl/746
[ 48.524480] lock: contig_page_data+0x80/0xd80, .magic: dead4ead, .owner: udevd/206, .owner_cpu: 3
[ 48.541540]
[ 48.543267] [<80013170>] (dump_backtrace) from [<8001338c>] (show_stack+0x18/0x1c)
[ 48.550854] r6:80a0e294 r5:00000000 r4:00000000 r3:00000000
[ 48.556648] [<80013374>] (show_stack) from [<806fc6f0>] (dump_stack+0x8c/0xa4)
[ 48.563909] [<806fc664>] (dump_stack) from [<80065608>] (spin_dump+0x7c/0xa4)
[ 48.571060] r6:0039911c r5:80a4d5c0 r4:ece81380 r3:00000000
[ 48.576847] [<8006558c>] (spin_dump) from [<800657bc>] (do_raw_spin_lock+0xf4/0x1b8)
[ 48.584605] r5:80a0e27c r4:80a4d5c0
[ 48.588265] [<800656c8>] (do_raw_spin_lock) from [<80703690>] (_raw_spin_lock_irqsave+0x50/0x5c)
[ 48.597066] r9:808a9770 r8:80a4d540 r7:00000141 r6:800b62a4 r5:400f0013 r4:80a4d5c0
[ 48.604976] [<80703640>] (_raw_spin_lock_irqsave) from [<800b62a4>] (get_page_from_freelist+0x318/0x6cc)
[ 48.614472] r6:80a4e200 r5:00000000 r4:80a4d5c0
[ 48.619194] [<800b5f8c>] (get_page_from_freelist) from [<800b6944>] (__alloc_pages_nodemask+0xfc/0x990)
[ 48.628603] r10:00000000 r9:00000001 r8:00000000 r7:00000141 r6:80a4e200 r5:00000000
[ 48.636569] r4:002000d0
[ 48.639158] [<800b6848>] (__alloc_pages_nodemask) from [<800b72a4>] (alloc_kmem_pages_node+0x20/0x28)
[ 48.648393] r10:edb91d40 r9:ffffffff r8:00000000 r7:80a5d500 r6:00000000 r5:ee0789c0
[ 48.656359] r4:00800711
[ 48.658954] [<800b7284>] (alloc_kmem_pages_node) from [<80026a98>] (copy_process.part.57+0xd4/0x153c)
[ 48.668203] [<800269c4>] (copy_process.part.57) from [<8002805c>] (do_fork+0xa8/0x40c)
[ 48.676135] r10:00000001 r9:ee082000 r8:00000000 r7:00000000 r6:80a0006c r5:00000000
[ 48.684101] r4:00800711
[ 48.686685] [<80027fb4>] (do_fork) from [<800283f0>] (kernel_thread+0x30/0x38)
[ 48.693923] r10:00000001 r9:ee082000 r8:00000000 r7:80a0008c r6:80a0006c r5:ec1e8180
[ 48.701889] r4:ec1e8194
[ 48.704485] [<800283c0>] (kernel_thread) from [<80044378>] (kthreadd+0xf0/0x160)
[ 48.711915] [<80044288>] (kthreadd) from [<8000f850>] (ret_from_fork+0x14/0x24)
[ 48.719239] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80044288
[ 48.727205] r4:00000000 r3:00000000
[ 48.730851] CPU: 2 PID: 746 Comm: evi_ctrl Tainted: G D O 3.19.0uniwest-evi+ #100
[ 48.739225] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 48.745768] Backtrace:
[ 48.748277] [<80013170>] (dump_backtrace) from [<8001338c>] (show_stack+0x18/0x1c)
[ 48.755865] r6:80a0e294 r5:00000000 r4:00000000 r3:00000000
[ 48.761652] [<80013374>] (show_stack) from [<806fc6f0>] (dump_stack+0x8c/0xa4)
[ 48.768908] [<806fc664>] (dump_stack) from [<80065608>] (spin_dump+0x7c/0xa4)
[ 48.776060] r6:0039911c r5:80a4d5c0 r4:ece81380 r3:00000000
[ 48.781845] [<8006558c>] (spin_dump) from [<800657bc>] (do_raw_spin_lock+0xf4/0x1b8)
[ 48.789604] r5:80a0e27c r4:80a4d5c0
[ 48.793261] [<800656c8>] (do_raw_spin_lock) from [<80703690>] (_raw_spin_lock_irqsave+0x50/0x5c)
[ 48.802062] r9:808a9770 r8:80a4d540 r7:00000141 r6:800b62a4 r5:600f0013 r4:80a4d5c0
[ 48.809966] [<80703640>] (_raw_spin_lock_irqsave) from [<800b62a4>] (get_page_from_freelist+0x318/0x6cc)
[ 48.819462] r6:80a4e200 r5:00000000 r4:80a4d5c0
[ 48.824183] [<800b5f8c>] (get_page_from_freelist) from [<800b6944>] (__alloc_pages_nodemask+0xfc/0x990)
[ 48.833591] r10:00000000 r9:00000002 r8:00000000 r7:00000141 r6:80a4e200 r5:00000000
[ 48.841557] r4:000146d0
[ 48.844143] [<800b6848>] (__alloc_pages_nodemask) from [<800b727c>] (alloc_kmem_pages+0x18/0x20)
[ 48.852944] r10:00003ee3 r9:00000000 r8:00003fc0 r7:80585314 r6:000106d0 r5:000004d0
[ 48.860910] r4:ec089b17
[ 48.863498] [<800b7264>] (alloc_kmem_pages) from [<800cb620>] (kmalloc_order+0x18/0x30)
[ 48.871536] [<800cb608>] (kmalloc_order) from [<800ede74>] (__kmalloc_track_caller+0x134/0x180)
[ 48.880265] [<800edd40>] (__kmalloc_track_caller) from [<80585260>] (__kmalloc_reserve.isra.49+0x2c/0x78)
[ 48.889846] r10:00003ee3 r9:00000000 r8:00003fc0 r7:80585314 r6:00000000 r5:000004d0
[ 48.897811] r4:ec089b17 r3:00000000
[ 48.901458] [<80585234>] (__kmalloc_reserve.isra.49) from [<80585314>] (__alloc_skb+0x68/0x15c)
[ 48.910172] r8:ee001e00 r7:000004d0 r6:00000000 r5:00003f22 r4:edb29240 r3:00000000
[ 48.918061] [<805852ac>] (__alloc_skb) from [<805855e0>] (alloc_skb_with_frags+0x50/0x1dc)
[ 48.926340] r9:00000000 r8:ecf88c8c r7:00000000 r6:00000000 r5:7fffffff r4:ecf88a80
[ 48.934239] [<80585590>] (alloc_skb_with_frags) from [<8057f010>] (sock_alloc_send_pskb+0x1c8/0x260)
[ 48.943387] r10:00003ee3 r9:00000000 r8:ecf88c8c[ 48.947021] BUG: spinlock lockup suspected on CPU#3, udevd/206
[ 48.947048] lock: contig_page_data+0x80/0xd80, .magic: dead4ead, .owner: udevd/206, .owner_cpu: 3
[ 48.962780] r7:8005ac44 r6:ec088000 r5:7fffffff
[ 48.967651] r4:ecf88a80
[ 48.970233] [<8057ee48>] (sock_alloc_send_pskb) from [<8057f0d0>] (sock_alloc_send_skb+0x28/0x30)
[ 48.979120] r10:eba5eb00 r9:00000000 r8:eda67e7c r7:00003eb0 r6:00003eb0 r5:00000000
[ 48.987079] r4:0000ffff
[ 48.989663] [<8057f0a8>] (sock_alloc_send_skb) from [<805c52f4>] (__ip_append_data.isra.42+0x7cc/0xae8)
[ 48.999083] [<805c4b28>] (__ip_append_data.isra.42) from [<805c70d4>] (ip_make_skb+0xb4/0xf0)
[ 49.007622] r10:ecf88d80 r9:ec089ca4 r8:805c4a7c r7:ec089ed8 r6:ecf88a80 r5:ec089d48
[ 49.015583] r4:00004000
[ 49.018171] [<805c7020>] (ip_make_skb) from [<805ee698>] (udp_sendmsg+0x250/0x8a4)
[ 49.025756] r9:00000000 r8:ffffff7f r7:00003ea8 r6:ec089ed8 r5:00003eb0 r4:ecf88a80
[ 49.033644] [<805ee448>] (udp_sendmsg) from [<805f98f8>] (inet_sendmsg+0xc8/0xfc)
[ 49.041141] r10:00000000 r9:ec088000 r8:00000000 r7:ec089e10 r6:ec089ed8 r5:00003ea8
[ 49.049103] r4:ecf88a80
[ 49.051684] [<805f9830>] (inet_sendmsg) from [<8057b184>] (do_sock_sendmsg+0xd8/0xf4)
[ 49.059528] r8:7ecb3e48 r7:edf9a400 r6:00004000 r5:00000000 r4:ec089e10
[ 49.066368] [<8057b0ac>] (do_sock_sendmsg) from [<8057b1b4>] (sock_sendmsg+0x14/0x18)
[ 49.074212] r5:00000000 r4:00003ea8
[ 49.077858] [<8057b1a0>] (sock_sendmsg) from [<8057d558>] (SyS_sendto+0xc8/0xf8)
[ 49.085285] [<8057d490>] (SyS_sendto) from [<8000f780>] (ret_fast_syscall+0x0/0x4c)
[ 49.092956] r8:8000f944 r7:00000122 r6:7ecb3e34 r5:00000010 r4:7ecb3e08
[ 49.099796] CPU: 3 PID: 206 Comm: udevd Tainted: G D O 3.19.0uniwest-evi+ #100
[ 49.107908] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 49.114451] Backtrace:
[ 49.116957] [<80013170>] (dump_backtrace) from [<8001338c>] (show_stack+0x18/0x1c)
[ 49.124544] r6:80a0e294 r5:00000000 r4:00000000 r3:00000000
[ 49.130328] [<80013374>] (show_stack) from [<806fc6f0>] (dump_stack+0x8c/0xa4)
[ 49.137583] [<806fc664>] (dump_stack) from [<80065608>] (spin_dump+0x7c/0xa4)
[ 49.144734] r6:0039911c r5:80a4d5c0 r4:ece81380 r3:00000000
[ 49.150517] [<8006558c>] (spin_dump) from [<800657bc>] (do_raw_spin_lock+0xf4/0x1b8)
[ 49.158276] r5:80a0e27c r4:80a4d5c0
[ 49.161928] [<800656c8>] (do_raw_spin_lock) from [<80703550>] (_raw_spin_lock+0x40/0x48)
[ 49.170033] r9:00000000 r8:00000000 r7:80a4d540 r6:6ddd3000 r5:809e92fc r4:80a4d5c0
[ 49.177931] [<80703510>] (_raw_spin_lock) from [<800b3338>] (free_pcppages_bulk+0x30/0x3ec)
[ 49.186298] r4:80a4d540
[ 49.188886] [<800b3308>] (free_pcppages_bulk) from [<800b5440>] (free_hot_cold_page+0x190/0x1d0)
[ 49.197686] r10:20080013 r9:00000000 r8:00000000 r7:80a4d540 r6:6ddd3000 r5:809e92fc
[ 49.205647] r4:0000001f
[ 49.208232] [<800b52b0>] (free_hot_cold_page) from [<800b54b4>] (free_hot_cold_page_list+0x34/0x50)
[ 49.217293] r10:00000000 r9:000001d7 r8:ece88758 r7:00000000 r6:00000000 r5:ecc4da08
[ 49.225255] r4:ef5808a0
[ 49.227842] [<800b5480>] (free_hot_cold_page_list) from [<800bb860>] (release_pages+0x218/0x22c)
[ 49.236643] r6:0000000c r5:000001d7 r4:ef595140 r3:00000000
[ 49.242435] [<800bb648>] (release_pages) from [<800e6370>] (free_pages_and_swap_cache+0x60/0x8c)
[ 49.251235] r10:00000001 r9:00000001 r8:ece88000 r7:000001d7 r6:ece88758 r5:ef595140
[ 49.259198] r4:000001d7
[ 49.261783] [<800e6310>] (free_pages_and_swap_cache) from [<800db9b4>] (exit_mmap+0x124/0x1fc)
[ 49.270410] r8:ece4cc00 r7:00000001 r6:ecc4da98 r5:ece4cc00 r4:ece6f7e8 r3:00000086
[ 49.278299] [<800db890>] (exit_mmap) from [<800266cc>] (mmput+0x54/0xfc)
[ 49.285015] r7:0000000b r6:ece4cc54 r5:00000000 r4:ece4cc00
[ 49.290796] [<80026678>] (mmput) from [<8002a654>] (do_exit+0x2a4/0x990)
[ 49.297512] r5:ece81740 r4:ece81380
[ 49.301165] [<8002a3b0>] (do_exit) from [<800135a8>] (die+0x218/0x3f8)
[ 49.307708] r7:0000000b
[ 49.310293] [<80013390>] (die) from [<806fa1f0>] (__do_kernel_fault.part.11+0x5c/0x7c)
[ 49.318225] r10:00000000 r9:efa4c914 r8:ecc4dcb0 r7:ece4cc00 r6:ecc4dcb0 r5:00000005
[ 49.326187] r4:efa4c914
[ 49.328779] [<806fa194>] (__do_kernel_fault.part.11) from [<8001b0f0>] (do_bad_area+0x8c/0x90)
[ 49.337406] r7:ece4cc00 r3:ecc4dcb0
[ 49.341058] [<8001b064>] (do_bad_area) from [<8001b180>] (do_translation_fault+0x74/0xbc)
[ 49.349250] r7:efa4c914 r6:80004000 r5:00003be8 r4:00000005
[ 49.355030] [<8001b10c>] (do_translation_fault) from [<80008584>] (do_DataAbort+0x3c/0xa0)
[ 49.363309] r6:8001b10c r5:00000005 r4:809f5dec r3:00000000
[ 49.369084] [<80008548>] (do_DataAbort) from [<80013e64>] (__dabt_svc+0x44/0x80)
[ 49.376497] Exception stack(0xecc4dcb0 to 0xecc4dcf8)
[ 49.381573] dca0: 80a4d540 00000000 00000034 80a4d67c
[ 49.389776] dcc0: 0000000e 0000001f ef5975f4 00000000 80a4d540 efa4c914 00000000 ecc4dd3c
[ 49.397975] dce0: ecc4dd40 ecc4dcf8 00000003 800b5c50 200f0093 ffffffff
[ 49.404604] r8:80a4d540 r7:ecc4dce4 r6:ffffffff r5:200f0093 r4:800b5c50
[ 49.411457] [<800b5bd0>] (__rmqueue) from [<800b6484>] (get_page_from_freelist+0x4f8/0x6cc)
[ 49.419823] r10:00000000 r9:808a9770 r8:80a4d540 r7:00000000 r6:ef5975f4 r5:0000001f
[ 49.427783] r4:0000000e
[ 49.430370] [<800b5f8c>] (get_page_from_freelist) from [<800b6944>] (__alloc_pages_nodemask+0xfc/0x990)
[ 49.439778] r10:00000000 r9:00000000 r8:00000000 r7:00000141 r6:80a4e200 r5:00000000
[ 49.447740] r4:000080d0
[ 49.450326] [<800b6848>] (__alloc_pages_nodemask) from [<800b71f0>] (__get_free_pages+0x18/0x34)
[ 49.459127] r10:00000400 r9:eb4cca78 r8:ecc4df5c r7:ecc4dec8 r6:ffffff9c r5:eb424c38
[ 49.467089] r4:eb424c38
[ 49.469674] [<800b71d8>] (__get_free_pages) from [<800b7224>] (get_zeroed_page+0x18/0x1c)
[ 49.477886] [<800b720c>] (get_zeroed_page) from [<80159940>] (kernfs_iop_follow_link+0x1c/0x194)
[ 49.486704] [<80159924>] (kernfs_iop_follow_link) from [<800fc008>] (generic_readlink+0x38/0x94)
[ 49.495505] r10:00000400 r9:eb4cca78 r8:ecc4df5c r7:7e8c9278 r6:ffffff9c r5:eb424c38
[ 49.503468] r4:00000400 r3:80159924
[ 49.507116] [<800fbfd0>] (generic_readlink) from [<800f72a8>] (SyS_readlinkat+0x9c/0xe8)
[ 49.515221] r7:7e8c8e78 r6:ffffff9c r5:00004000 r4:ffffffea
[ 49.520999] [<800f720c>] (SyS_readlinkat) from [<800f7318>] (SyS_readlink+0x24/0x28)
[ 49.528757] r10:00000000 r9:ecc4c000 r8:8000f944 r7:00000055 r6:7e8c9690 r5:7e8c9278
[ 49.536718] r4:7e8c8e78
[ 49.539300] [<800f72f4>] (SyS_readlink) from [<8000f780>] (ret_fast_syscall+0x0/0x4c)
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